diff --git a/backend/provisioner.py b/backend/provisioner.py
index ec81bd1..5f47dab 100644
--- a/backend/provisioner.py
+++ b/backend/provisioner.py
@@ -30,8 +30,12 @@ from converter import extract_if_needed, discover_disk, detect_efi
 
 logger = logging.getLogger("backend.provisioner")
 
+STAGING_IN = Path("/mnt/converter/in")
 STAGING_OUT = Path("/mnt/converter/out")
 
+def _staging_in(session_id: str = "") -> Path:
+    return STAGING_IN / session_id if session_id else STAGING_IN
+
 def _staging_out(session_id: str = "") -> Path:
     return STAGING_OUT / session_id if session_id else STAGING_OUT